Fednav has signed a contract for Optimarin to equip seven of its vessels with U.S. Coast Guard-approved Optimarin Ballast Systems (OBS). Five of the units will be fitted on existing vessels while the other two are slated for bulk carriers scheduled for delivery in 2019. The order is in addition to last year’s agreements for five units, signaling a growing relationship between the two market leaders. Fednav is the first shipping company to install and use ballast water systems in the fresh waters of the Great Lakes-St. Lawrence waterway system.